The answer is D. <span> invention of the first steel tools
Actually, this very topic is still a hot debate among scientists because the shift happens on different reasons in each region of the world.
But one thing they have in common is that Steel tools give the member of early societies the capabilities to rake uplands and cutting up crops that really useful in farming and herding.</span>
First of he died stabbed. One of his "friends" Brutus helped stab him I believe he was stabbed 32 or 36 times. His last words were to Brutus and they were"u too? His death lead to an empire because his nehpew was next in reign. Augustus made the empire.
During the twentieth century, the study of the large-scale structure of the universe evolved from the theoretical to the practical; the field of physical cosmology was made possible because of both Einstein's theory of relativity and the better ability to observe extremely distant astronomical objects. Option A is correct.
Albert Einstein formulated two theories which he included to his theory of relativity. On the one hand the special relativity and on the other hand, general relativity.
The former refers to the lack of gravity and the physical phenomena that occurs because of it and the latest refers to the law of gravitation.
If I had a time travel machine and it was only able to make leaps of 500 years, than it would be possible to visit:
- D'mt civilization;
in the period of 500 BC, the kingdom of D'mt in what is now Ethiopia was prospering, and the D'mt civilization set the basis for the multiple civilization that descended from it in the centuries to come.
- Egyptian civilization and Nubian civilization;
In the year 2,000 BC the Egyptians were thriving in the northeaster part of Africa, along the shores of the Nile River, and they were one of the greatest civilizations of the ancient world. Just little south of them, was the Nubian civilization, very well known for its excellent cavalry and military character.